CN112413305B

CN112413305B - Portable emergent projection arrangement that imparts knowledge to students

Info

Publication number: CN112413305B
Application number: CN202011262798.9A
Authority: CN
Inventors: 敖山; 崔艳; 唐朝生; 刘小燕; 徐敏; 彭雄飞; 申锦鹏
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2022-03-08
Anticipated expiration: 2040-11-12
Also published as: CN112413305A

Abstract

The invention relates to the technical field of projection equipment, in particular to a portable emergency teaching projection device. The frame is movably installed on the upper part of the receiving frame, and the projector is inserted into the inside of the receiving frame. Rubber teeth are evenly connected on both sides of the upper surface of the sliding plugboard. The center of the top surface of the frame is fixedly connected with a threaded sleeve, one side of the limit frame is fixedly connected with a limit card plate, the inner center of the limit card plate is fixedly connected with a support rod, and the middle outer surface of the support rod is rotated and sleeved with a pull ring . The invention can conveniently carry the emergency projection device, and can quickly install, store and use the backup equipment in the case of power failure, so as to avoid affecting the normal progress of teaching.

Description

Portable emergent projection arrangement that imparts knowledge to students

Technical Field

The invention relates to the technical field of projection teaching equipment, in particular to a portable emergency teaching projection device.

Background

The projecting apparatus can be used usually in modern teaching activities to the teaching content that the demonstration will appear better, the student more audio-visual study of being convenient for, the projecting apparatus of teaching usefulness need use projection arrangement to fix the projecting apparatus on the ceiling in classroom usually, thereby and keep the picture stability that the projecting apparatus throwed out, and the power of intercommunication teaching building again can carry out teaching work when going upstairs.

The existing projection device can only be placed at a fixed position, can not be effectively adjusted, projects to different positions, and can not work under the condition of power failure, so that the teaching quality is influenced, and therefore a portable emergency teaching projection device is needed to solve the problem of the prior art.

Disclosure of Invention

The invention aims to provide a portable emergency teaching projection device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a portable emergent projection arrangement that imparts knowledge to students, includes projecting apparatus, spacing frame, accepts frame and slip picture peg, the slip picture peg slides and pegs graft inside the bottom of accepting the frame, spacing frame movable mounting is on the upper portion of accepting the frame, the projecting apparatus pegs graft in the inside of accepting the frame, the even fixedly connected with rubber tooth in slip picture peg upper surface both sides edge, the both sides limit fixedly connected with joint board of slip picture peg, the spacing fixture block of a side both ends symmetry fixedly connected with of slip picture peg, the opposite side both ends symmetry fixedly connected with joint piece of slip picture peg.

Specifically, the center of the top surface of the limit frame is fixedly connected with a threaded sleeve, one side surface of the limit frame is fixedly connected with a limit clamping plate, the inner center of the limiting clamping plate is fixedly connected with a supporting rod, the outer surface of the middle part of the supporting rod is rotatably sleeved with a pull ring, the two end surfaces of the limit frame are symmetrically and fixedly connected with limit side plates, the two sides of the bottom of the side surface of each limit side plate are symmetrically provided with limit clamping grooves, the two sides of the upper part of one side surface of the limit frame are symmetrically and fixedly connected with limit blocks, one end surface of each limit block is movably inserted with an inserting plate, the upper surface of the plugboard is provided with a tooth-shaped clamping groove, one end surface of the plugboard is fixedly connected with a baffle plate, the top surface center fixed movable mounting of stopper has positioner, the both ends face one side symmetrical welding of spacing frame has the backup pad, the side bottom center welding of spacing frame has drive arrangement.

Specifically, positioner's inside fixed mounting has the horizontal pole, the both ends bottom surface symmetry fixedly connected with connecting rod of horizontal pole, the bottom surface fixedly connected with profile of tooth fixture block of connecting rod, the upper surface both ends edge symmetry fixedly connected with spring of profile of tooth fixture block.

Specifically, the top fixedly connected with roof of accepting the frame, the spacing spout has been seted up to a side edge symmetry of accepting the frame, the rack has all been seted up to the equal symmetry of both ends face of accepting the frame, the equal fixedly connected with limit stop in both ends face bottom center of accepting the frame, the inside bottom bilateral symmetry fixed mounting of accepting the frame has the guide arm, the inserting groove has been seted up at the upper surface center of guide arm.

Specifically, the limiting frame is movably clamped with a limiting sliding groove on one side of the bearing frame through a supporting plate at the bottom end of the side face of the limiting clamping plate.

Specifically, the tooth-shaped clamping blocks at the bottoms of the two ends of the cross rod are meshed with the tooth-shaped clamping grooves in the upper surface of the plug board in the limiting block, and the springs are fixedly connected with the upper surface of the limiting block in the tooth-shaped clamping blocks.

Specifically, the sliding insertion plate is movably inserted into the insertion groove in the upper surface of the guide rod through the clamping plates on the two side surfaces, and the sliding insertion plate is clamped with one side surface of the projector on the upper surface through the clamping block on one side edge.

Specifically, the guide rod is clamped with a limiting clamping block at one side edge of the sliding insertion plate through a limiting stop block at the center of the side surface, and the sliding insertion plate is in extrusion contact with the bottom surface of the projector through rubber teeth on the upper surface.

Specifically, a driving motor is arranged in the driving device, one end face of the driving motor is fixedly connected with a first rotating shaft, a second rotating shaft is movably inserted on one end face of the driving motor and positioned at the edge of the first rotating shaft, a driving gear is welded on the outer surface of one end edge of the first rotating shaft and one end edge of the second rotating shaft, the driving gears are meshed and connected, second transmission gears are welded on the outer surfaces of one ends of the first rotating shaft and the second rotating shaft and positioned at the edges of the driving gears, the outer surface of the second transmission gear is engaged and sleeved with a transmission toothed belt, the inner surface of one end of the transmission toothed belt is engaged and clamped with a first transmission gear, the welding of the side center of first drive gear has the dwang, driven gear has all been welded to the both ends marginal outward appearance of dwang, the marginal symmetrical welding in medial surface bottom both sides of spacing frame has T type cardboard.

Compared with the prior art, the invention has the following beneficial effects:

the threaded sleeve is fixedly connected to the center of the top face of the limiting frame, the limiting clamping plate is fixedly connected to one side face of the limiting frame, the supporting rod is fixedly connected to the center of the interior of the limiting clamping plate, the pull ring is sleeved on the outer surface of the middle of the supporting rod in a rotating mode, the limiting side plates are symmetrically and fixedly connected to the two end faces of the limiting side plates, the limiting clamping grooves are symmetrically formed in the two sides of the bottom of the side face of the limiting side plate, the limiting blocks are symmetrically and fixedly connected to the two sides of the upper portion of one side face of the limiting frame, the inserting plate is movably inserted into one end face of each limiting block, the tooth-shaped clamping grooves are formed in the upper surface of the inserting plate, the baffle is fixedly connected to one end face of each inserting plate, and the positioning devices which are movably mounted are fixedly arranged at the center of the top face of each limiting block.

The inner part of the positioning device is fixedly provided with a cross rod which can be convenient for workers to control the tooth-shaped clamping blocks at the two ends of the cross rod, the bottom surfaces of the two ends of the cross rod are symmetrically and fixedly connected with a connecting rod which can play a role in connecting the cross rod and the tooth-shaped clamping blocks, the tooth-shaped clamping blocks fixedly connected with the bottom surfaces of the connecting rod can be meshed and clamped with the tooth-shaped clamping grooves on the upper surface of the inserting plate to position the baffle plate, the edges of the two ends of the upper surface of each tooth-shaped clamping block are symmetrically and fixedly connected with springs which can generate elasticity under pressure to provide reset power for the tooth-shaped clamping blocks, the top plate fixedly connected with the top of the bearing frame can play a role in supporting and bearing the standby projector, the edge of one side surface of the bearing frame is symmetrically provided with limiting sliding grooves which can limit the sliding separation of the limiting frame and the bearing frame, and the centers of the bottoms of the two end surfaces of the bearing frame are fixedly connected with limiting blocks, the guide rods are symmetrically and fixedly arranged at two sides of the bottom end of the interior of the bearing frame, and the inserting grooves formed in the centers of the upper surfaces of the guide rods can limit the sliding of the sliding inserting plates, so that the sliding inserting plates are guaranteed not to shake when sliding.

The limiting frame is movably clamped with a limiting sliding groove on one side of the bearing frame through a supporting plate at the bottom end of the side of the limiting clamping plate, tooth-shaped clamping blocks at the bottoms of two ends of the cross rod are meshed and connected with tooth-shaped clamping grooves on the upper surface of the inserting plate in the limiting block to position the inserting plate in the limiting block, a spring is fixedly connected with the upper surface of the inner part of the limiting block on the upper surface of the tooth-shaped clamping block, the end of the spring can not move when the spring is stressed, the sliding inserting plate is movably inserted with the inserting grooves on the upper surface of the guide rod through the clamping plates on two sides, the sliding inserting plate can transversely slide back and forth at the bottom end of the inner part of the bearing frame, the sliding inserting plate is clamped with one side of the projector on the upper surface through a clamping block on one side, the side of the projector can be limited and protected, and the guide rod is clamped with the limiting clamping block on one side of the sliding inserting plate through a limiting block in the center of the side, can play the restriction effect to the slip of slip picture peg, prevent to slide the inside that the in-process breaks away from the inserting groove, the bottom surface looks extrusion contact of rubber tooth and the projecting apparatus of upper surface is passed through to the slip picture peg, can increase the frictional force between the bottom surface of projecting apparatus and the slip picture peg upper surface to can drive the projecting apparatus and slide when the slip picture peg slides.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention;

FIG. 2 is a schematic view of the main body of the present invention in an expanded configuration;

FIG. 3 is an expanded view of the spacing frame of the present invention;

FIG. 4 is a schematic structural diagram of a positioning device according to the present invention;

FIG. 5 is a schematic view of a receiving frame structure according to the present invention;

FIG. 6 is a schematic view of a sliding insert plate according to the present invention;

fig. 7 is a schematic structural diagram of a driving device of the present invention.

In the figure: 1-projector, 2-limit frame, 21-limit clamping plate, 22-support rod, 23-pull ring, 24-support plate, 25-limit side plate, 26-limit clamping groove, 27-limit block, 28-plug plate, 29-baffle plate, 210-tooth-shaped clamping groove, 211-positioning device, 212-threaded sleeve, 213-connecting rod, 214-tooth-shaped clamping block, 215-spring, 216-cross rod, 217-driving device, 218-driving motor, 219-first transmission gear, 220-rotating rod, 221-driven gear, 222-transmission toothed belt, 223-first rotating shaft, 224-second rotating shaft, 225-second transmission gear, 226-driving gear, 3-connecting frame, 31-plug groove, 32-limit stop, 33-rack, 34-guide rod, 35-limit sliding groove, 36-top plate, 4-sliding inserting plate, 41-clamping block, 42-rubber tooth, 43-clamping plate and 44-limit clamping block.

Detailed Description

Referring to fig. 1-7, an embodiment of the present invention is shown: the utility model provides a portable emergent projection arrangement that imparts knowledge to students, including projecting apparatus 1, spacing frame 2, accept frame 3 and slip picture peg 4, slip picture peg 4 slides and pegs graft inside the bottom of accepting

frame

3, 2 movable mounting of spacing frame are on the upper portion of accepting frame 3, projecting apparatus 1 pegs graft in the inside of accepting frame 3, the even fixedly connected with rubber tooth 42 in 4 upper surface both sides edges of slip picture peg, the both sides limit fixedly connected with joint board 43 of slip picture peg 4, the spacing fixture block 44 of a side both ends symmetry fixedly connected with of slip picture peg 4, the other side both ends symmetry fixedly connected with joint piece 41 of slip picture peg 4.

Specifically, top surface center fixedly connected with threaded sleeve 212 of spacing frame 2, spacing cardboard 21 of a side fixedly connected with of spacing frame 2, the inside center fixedly connected with bracing piece 22 of spacing cardboard 21, the middle part surface of bracing piece 22 rotates and has cup jointed pull ring 23, spacing curb plate 25 of both ends face symmetry fixedly connected with, spacing draw-in groove 26 has been seted up to the side bottom bilateral symmetry of spacing curb plate 25, 2 a side upper portion bilateral symmetry fixedly connected with stopper 27 of spacing frame, a terminal surface activity grafting of stopper 27 has plugboard 28, profile of tooth draw-in groove 210 has been seted up to the upper surface of plugboard 28, a terminal surface fixedly connected with baffle 29 of plugboard 28, the central fixed movable mounting's of top surface positioner 211 of stopper 27, can control the position of plugboard 28.

Specifically, the cross bar 216 fixedly installed inside the positioning device 211 can facilitate a worker to control the tooth-shaped fixture blocks 214 at the two ends of the cross bar 216, the connecting rods 213 symmetrically and fixedly connected to the bottom surfaces of the two ends of the cross bar 216 can connect the cross bar 216 and the tooth-shaped fixture blocks 214, the tooth-shaped fixture blocks 214 fixedly connected to the bottom surfaces of the connecting rods 213 can be engaged and clamped with the tooth-shaped fixture grooves 210 on the upper surface of the insertion plate 28 to position the baffle 29, and the springs 215 symmetrically and fixedly connected to the edges of the two ends of the upper surface of the tooth-shaped fixture blocks 214 can generate elastic force under pressure to provide reset power for the tooth-shaped fixture blocks 214.

It is specific, accept top fixed connection's of frame 3 roof 36, can play the support to accept the effect to reserve projecting apparatus, accept the spacing spout 35 that a side edge symmetry of frame 3 was seted up, can restrict spacing frame 2 and the looks sliding separation who accepts frame 3, accept the equal fixed connection's in both ends face bottom center limit stop 32 of frame 3, the inside bottom bilateral symmetry fixed mounting who accepts frame 3 has guide arm 34, the inserting groove 31 of seting up at the upper surface center of guide arm 34, can play the restriction needs to the slip of slip picture peg 4, guarantee that slip picture peg 4 does not take place to rock when sliding.

Specifically, the limiting frame 2 is movably clamped with the limiting sliding groove 35 on one side of the carrying frame 3 through the T-shaped clamping plate at the bottom end of the side of the limiting clamping plate 21.

Specifically, the tooth-shaped fixture blocks 214 at the bottoms of the two ends of the cross bar 216 are meshed with the tooth-shaped fixture grooves 210 on the upper surface of the plug board 28 in the limiting block 27, so that the plug board 28 in the limiting block 27 can be positioned, and the spring 215 is fixedly connected with the upper surface of the limiting block 27 on the upper surface of the tooth-shaped fixture blocks 214, so that the end of the spring 215 is prevented from moving when the spring is pressed.

Specifically, the sliding insertion plate 4 is movably inserted into the insertion groove 31 on the upper surface of the guide rod 34 through the clamping plates 43 on the two side surfaces, so that the sliding insertion plate 4 can be ensured to transversely slide back and forth at the bottom end inside the bearing frame 3, the sliding insertion plate 4 is clamped with one side surface of the projector 1 on the upper surface through the clamping block 41 on one side edge, and the side edge of the projector 1 can be limited and protected.

Specifically, the guide rod 34 is clamped with a limit block 44 at one side of the sliding insertion plate 4 through a limit block 32 at the center of the side surface, so that the sliding of the sliding insertion plate 4 can be limited, the inside of the insertion groove 31 is prevented from being separated in the sliding process, the sliding insertion plate 4 is in extrusion contact with the bottom surface of the projector 1 through a rubber tooth 42 on the upper surface, the friction force between the bottom surface of the projector 1 and the upper surface of the sliding insertion plate 4 can be increased, and the projector 1 can be driven to slide when the sliding insertion plate 4 slides.

The center of the top surface of the limiting frame 2 is fixedly connected with a threaded sleeve 212, one side surface of the limiting frame 2 is fixedly connected with a limiting clamping plate 21, the inner center of the limiting clamping plate 21 is fixedly connected with a support rod 22, the outer surface of the middle part of the support rod 22 is rotatably sleeved with a pull ring 23, two end surfaces are symmetrically and fixedly connected with limiting side plates 25, two sides of the bottom of the side surface of each limiting side plate 25 are symmetrically provided with limiting clamping grooves 26, two sides of the upper part of one side surface of the limiting frame 2 are symmetrically and fixedly connected with limiting blocks 27, one end surface of each limiting block 27 is movably inserted with an inserting plate 28, the upper surface of each inserting plate 28 is provided with a tooth-shaped clamping groove 210, one end surface of each inserting plate 28 is fixedly connected with a baffle 29, the center of the top surface of each limiting block 27 is fixedly and movably provided with a positioning device 211, one side edge of two end surfaces of the limiting frame 2 is symmetrically welded with a support plate 24, and the center of the bottom of the side surface of the limiting frame 2 is welded with a driving device 217, a cross bar 216 is fixedly arranged inside the positioning device 211, connecting rods 213 are symmetrically and fixedly connected to the bottom surfaces of the two ends of the cross bar 216, a tooth-shaped fixture block 214 is fixedly connected to the bottom surface of the connecting rod 213, springs 215 are symmetrically and fixedly connected to the edges of the two ends of the upper surface of the tooth-shaped fixture block 214, a top plate 36 is fixedly connected to the top of the receiving frame 3, a limit chute 35 is symmetrically arranged on the edge of one side surface of the receiving frame 3, a rack 33 is symmetrically arranged on the two end surfaces of the receiving frame 3, a limit stop 32 is fixedly connected to the center of the bottom of the two end surfaces of the receiving frame 3, guide rods 34 are symmetrically and fixedly arranged on the two sides of the bottom of the receiving frame 3, an insertion groove 31 is arranged in the center of the upper surface of the guide rod 34, the limit frame 2 is movably inserted and connected with the limit chute 35 on one side surface of the receiving frame 3 through a T-shaped clamping plate at the bottom of the limit clamping plate 21, the tooth-shaped fixture blocks 214 at the two ends of the cross bar 216 are engaged and connected with the tooth-shaped clamping groove 210 on the upper surface of the insertion plate 28 inside the limit block 27, the spring 215 is fixedly connected with the inner upper surface of the limiting block 27 on the upper surface of the tooth-shaped fixture block 214, the sliding inserting plate 4 is movably inserted into the insertion groove 31 on the upper surface of the guide rod 34 through the clamping plates 43 on the two side surfaces, the sliding inserting plate 4 is clamped with one side surface of the projector 1 on the upper surface through the clamping block 41 on one side surface, the guide rod 34 is clamped with the limiting fixture block 44 on one side surface of the sliding inserting plate 4 through the limiting stop 32 in the center of the side surface, the sliding inserting plate 4 is in pressing contact with the bottom surface of the projector 1 through the rubber teeth 42 on the upper surface, the driving device 217 is internally provided with the driving motor 218, one end surface of the driving motor 218 is fixedly connected with a first rotating shaft 223, one end surface of the driving motor 218 is movably inserted with a second rotating shaft 224 on the edge of the first rotating shaft 223, and the outer surfaces of one end edges of the first rotating shaft 223 and the second rotating shaft 224 are welded with the driving gear 226, and the meshing connection between the drive gear 226, the second drive gear 225 has all been welded at the one end surface of first axis of rotation 223 and second axis of rotation 224 and the edge that is located drive gear 226, drive toothed belt 222 has been cup jointed in the surface meshing of second drive gear 225, the one end internal surface meshing joint of drive toothed belt 222 has first drive gear 219, the side center welding of first drive gear 219 has dwang 220, driven gear 221 has all been welded at the both ends marginal outward appearance of dwang 220, the marginal symmetric welding in medial surface bottom both sides of spacing frame 2 has T type cardboard.

The working principle is as follows: during teaching, a projector is often used to project contents to be displayed on the surface of a piece of shadow cloth, so that the contents to be displayed are enlarged and can be conveniently watched by a student, but when power is suddenly cut off in the teaching process, some emergency measures are needed to be adopted to adjust the projection device, so that the projector is replaced to play an emergency role, when the projection device is adjusted, a control panel is operated firstly, so that a driving motor 218 is electrified to drive a first rotating shaft 223 at one end to rotate clockwise, the first rotating shaft 223 rotates and simultaneously drives a driving gear 226 on the outer surface to rotate together with a second transmission gear 225, the driving gear 226 on the outer surface of the first rotating shaft 223 rotates and drives a driving gear 226 on the outer surface of a second rotating shaft 224 to rotate together, and the second transmission gear 225 rotates and drives a transmission toothed belt 222 on the outer surface to rotate, so that two groups of transmission toothed belts 222 rotate in opposite directions, the first transmission gear 219 on the inner surface of one end is driven to rotate while the transmission toothed belt 222 rotates, the first transmission gear 219 drives the driven gear 221 to rotate through the rotation rod 220 at the center of the side surface when rotating, the driven gear 221 rotates on the surface of the toothed rail 33 on one end surface of the receiving frame 3 when rotating, so that the receiving frame 3 slides downwards on the inner surface of the limiting frame 2 until the T-shaped clamping plate at the bottom of the side surface of the limiting clamping plate 21 slides to the top end inside the limiting sliding groove 35, and the driving motor 218 is powered off and stops running, so as to fix the receiving frame 3 after sliding downwards, and then the cross bar 216 is pulled upwards to drive the tooth-shaped fixture block 214 at the bottom end to rise inside the limiting block 27 through the connecting rods 213 at the bottom surfaces of the two ends, and meanwhile, the tooth-shaped fixture block 214 can squeeze the spring 215 on the upper surface to shrink to generate elastic force, and the tooth-shaped fixture block 214 can be separated from the tooth-shaped slot 210 on the upper surface of the inserting plate 28 inside the limiting block 27, then pulling the baffle 29 to drive the insertion plates 28 on the side surfaces to transversely slide in the inner part of one end surface of the limit block 27, making the side surface of the baffle 29 far away from the upper part of the side surface of the limit frame 2, then inserting the standby projector between the upper surface of the receiving frame 3 and the inner part of the limit frame 2, and making the projector placed in the center of the upper surface of the top plate 36, then pulling the cross rod 216 upwards to drive the tooth-shaped fixture block 214 at the bottom end to ascend in the limit block 27 through the connecting rods 213 at the bottom surfaces of the two ends, at the same time, the tooth-shaped fixture block 214 can compress the spring 215 on the upper surface to generate elasticity, then pushing the side surfaces of the baffle 29 to drive the two groups of insertion plates 28 to be inserted in the inner part of one end of the limit block 27 until the side surfaces of the baffle 29 are in contact with the upper part of the side surfaces of the projector, then removing the external force on the outer surface of the cross rod 216, and at the same time, the tooth-shaped fixture block 214 can reset under the action of the elasticity generated by the spring 215, after the emergency use, the transverse rod 216 is pulled upwards to drive the tooth-shaped fixture block 214 at the bottom end to ascend inside the limiting block 27 through the connecting rods 213 at the bottom surfaces of the two ends, meanwhile, the tooth-shaped fixture block 214 can extrude the spring 215 on the upper surface to contract to generate elasticity, the tooth-shaped fixture block 214 can be separated from the tooth-shaped fixture groove 210 on the upper surface of the inserting plate 28 inside the limiting block 27, then the baffle plate 29 is pulled to drive the inserting plate 28 on the side surface to transversely slide inside the end surface of the limiting block 27, so that the side surface of the baffle plate 29 is far away from the upper part of the side surface of the limiting frame 2, then the spare projector is taken out, the baffle 29 is reset, then the driving motor 218 is electrified to drive the first rotating shaft 223 at one end to rotate anticlockwise, the driving gear 226 on the outer surface and the second transmission gear 225 are driven to rotate together while the first rotating shaft 223 rotates, the driving gear 226 on the outer surface of the first rotating shaft 223 is driven to rotate together while the driving gear 226 on the outer surface of the second rotating shaft 224 is driven to rotate, the transmission toothed belt 222 on the outer surface is driven to rotate while the second transmission gear 225 rotates, so that the two sets of transmission toothed belts 222 rotate in opposite directions, the first transmission gear 219 on the inner surface at one end is driven to rotate while the transmission toothed belt 222 rotates, the first transmission gear 219 drives the driven gear 221 to rotate through the rotating rod 220 at the center of the side, and the driven gear 221 rotates on the surface of the toothed rail 33 on one end face of the frame 3, so that the receiving frame 3 slides upwards on the inner surface of the limit frame 2 until the T-shaped card board at the bottom of the side surface of the limit card board 21 slides to the bottom end in the limit sliding groove 35 until the limit frame 2 and the receiving frame 3 are completely clamped, and simultaneously the driving motor 218 is powered off and stops running, so that the receiving frame 3 after sliding upwards is fixed, when the corresponding emergency projection device is carried, the projector in the receiving frame 3 needs to be dismounted first, the projector in the receiving frame 3 is powered off first, then the side edge of the sliding plug board 4 is pulled to slide transversely in the receiving frame 3, meanwhile, the sliding plug board 4 slides in the insertion groove 31 through the clamping boards 43 on the two sides, and simultaneously, the sliding plug board 4 drives the projector on the upper surface to move together until the limit blocks 44 on the side edge of the sliding plug board 4 are in contact with the limit stops 32 in the center of the side surface of the guide rod 34, then take out the projecting apparatus on the upper surface of the sliding insertion plate 4, push the side of the sliding insertion plate 4 to reset, then rotate the projecting apparatus to separate the threaded sleeve 212 from the threaded rod at the top, and then hold the pull ring 23 by hand to conveniently carry the projecting apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A portable emergency teaching projection device, comprising a projector (1), a limit frame (2), a receiving frame (3) and a sliding plate (4), characterized in that: the sliding plate (4) slides It is inserted inside the bottom of the receiving frame (3), the limiting frame (2) is movably installed on the upper part of the receiving frame (3), and the projector (1) is inserted into the inside of the receiving frame (3), so the Rubber teeth (42) are evenly and fixedly connected to both edges of the upper surface of the sliding plug board (4), and clamping plates (43) are fixedly connected to both sides of the sliding plug board (4). 4) The two ends of one side of one side are symmetrically and fixedly connected to the limiting block (44), and the two ends of the other side of the sliding insert plate (4) are symmetrically and fixedly connected to the two ends of the clamping block (41). The center of the top surface of (2) is fixedly connected with a threaded sleeve (212), and one side of the limit frame (2) is fixedly connected with a limit card (21), and the inner center of the limit card (21) A support rod (22) is fixedly connected, the middle outer surface of the support rod (22) is rotatably sleeved with a pull ring (23), and the two ends of the limit frame (2) are symmetrically and fixedly connected to the limit side plates (25) , the side bottom of the limit side plate (25) is symmetrically provided with limit slots (26) on both sides, and the limit block (27) is symmetrically and fixedly connected on both sides of the upper side of the limit frame (2). One end face of the limiting block (27) is movably plugged with a plug-in board (28), the upper surface of the plug-in board (28) is provided with a tooth-shaped card slot (210), and the plug-in board (28) is A baffle plate (29) is fixedly connected to one end surface, a positioning device (211) is fixed and movable in the center of the top surface of the limiting block (27), and one side of the two end surfaces of the limiting frame (2) is symmetrically welded with a A support plate (24), a drive device (217) is welded to the center of the side bottom of the limiting frame (2), a drive motor (218) is installed inside the drive device (217), and the drive motor (218) A first rotating shaft (223) is fixedly connected to one end face of the drive motor (218), and a second rotating shaft (224) is movably inserted on one end face of the drive motor (218) and is located at the edge of the first rotating shaft (223). A drive gear (226) is welded on the outer surface of one end edge of a rotating shaft (223) and the second rotating shaft (224), and the drive gears (226) are meshed and connected. The first rotating shaft (223) and the The outer surface of one end of the second rotating shaft (224) and the edge of the driving gear (226) are welded with a second transmission gear (225), and the outer surface of the second transmission gear (225) is meshed and sleeved with a transmission toothed belt (222), the inner surface of one end of the transmission toothed belt (222) is engaged with a first transmission gear (219), and a rotating rod (220) is welded to the center of the side surface of the first transmission gear (219). Driven gears (221) are welded on the outer surfaces of both ends of the rotating rod (220), and a top plate (36) is fixedly connected to the top of the receiving frame (3). A limit chute (35) is symmetrically set on one side edge of (3), and the limit frame (2) passes through a T-shaped card plate and a limit chute welded symmetrically at the bottom edge of the side of the limit card plate (21). (35) The two end faces of the receiving frame (3) are symmetrically provided with tooth rails (33), and the bottom centers of the two end faces of the receiving frame (3) are fixedly connected to the limit stops (32). A guide rod (34) is fixedly installed symmetrically on both sides of the inner bottom end of the receiving frame (3), and an insertion slot (31) is opened in the center of the upper surface of the guide rod (34).

2 . The portable emergency teaching projection device according to claim 1 , wherein a cross bar ( 216 ) is fixedly installed inside the positioning device ( 211 ), and the bottom surfaces of both ends of the cross bar ( 216 ). A connecting rod (213) is symmetrically and fixedly connected, the bottom surface of the connecting rod (213) is fixedly connected with a toothed block (214), and two ends of the upper surface of the toothed block (214) are symmetrically and fixedly connected with springs (215).

3 . The portable emergency teaching projection device according to claim 2 , wherein the toothed blocks ( 214 ) at the bottoms of the two ends of the cross bar ( 216 ) are inserted into the limit block ( 27 ) inside the limit block ( 27 ). 4 . The tooth-shaped grooves (210) on the upper surface of the connecting plate (28) are engaged and connected, and the spring (215) is fixedly connected to the inner upper surface of the limit block (27) on the upper surface of the tooth-shaped clamping block (214). .

4 . The portable emergency teaching projection device according to claim 1 , wherein the sliding plug board ( 4 ) is plugged with the upper surface of the guide rod ( 34 ) through the clamping boards ( 43 ) on both sides. 5 . The grooves (31) are movably plugged and connected, and the sliding plug board (4) is clamped to one side of the projector (1) on the upper surface through a clamping block (41) on one side.

5 . The portable emergency teaching projection device according to claim 4 , wherein the guide rod ( 34 ) passes through the limit block ( 32 ) in the center of the side surface and the sliding plate ( 4 ) on one side. 6 . The limit clamping blocks (44) are clamped together, and the sliding insert plate (4) is in pressing contact with the bottom surface of the projector (1) through the rubber teeth (42) on the upper surface.